[Linux SDL2] Duplicate numeric keyboard entries.

[Yona-TYT]

This only happens if the numeric keyboard is used, if you type 2 it appears 22, it is something strange and I am sure it did not happen before.

[Mariculous]

Yes, I can confirm this.
I was wondering it might have been my xserver setup spawning the game on a remote display, but I can now confirm it's the exact same when running the game locally.

[ceeac]

Should be fixed in r9595.

[Matthew]

This bug was also introduced to Extended by the Great Merge in early December.

[prissi]

This was still broken, when numpad_always_moves_map = 1. In r9599 it should scroll then map with this, but still enter normal text in input fields.